What does the expected value of a binomial distribution with n trials tell you?
1 answer:
Answer:
The expected value of a binomial distribution with n trials tell us about the the average number of successes
Step-by-step explanation:
A binomial distribution is a frequency distribution of the possible number of successful outcomes in a given number of trials such that there is the same probability of success of each of the outcome.
For n trials with probability of success of each outcome as p, expected value of a binomial distribution is given by .
If we toss 200 coins, and X is the number of heads, the expected value of X is 100= (1/2)200.
So, basically the expected value of a binomial distribution with n trials tell us about the the average number of successes .
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Given:
• Volume of small containers = 2.5 m³
,• Volume of large containers = 4 m³
,• Number of containers in the shipment = 140
,• Total volume = 440 m³
Let's find the number of the size of each container used.
Let s represent the number of small containers
Let L represent the number of large containers.
• Equation for number of containers:
s + L = 140
• Equation for total volume:
2.5s + 4L = 140
Hence, we have the set of equations:
s + L = 140...........................equation 1
2.5s + 4L = 440...................equation 2
Let's solve the set of equations simultaneously using substitution methos.
Rewrite equation 1 for L:
L = 140 - s...........................equation 3
Substitute (140 -s) for L in equation 2:
2.5s + 4(140 - s) = 440
Apply distributive property:
2.5s + 4(140) + 4(-s) = 440
2.5s + 560 - 4s = 440
Combine like terms:
2.5s - 4s + 560 = 440
-1.5s + 560 = 440
Subtract 560 from both sides:
-1.5s + 560 - 560 = 440 - 560
-1.5s = -120
Divide both sides by -1.5:
Substitute 80 for s in either of the equations.
Take equation 3.
L = 140 - s
L = 140 - 80
L = 60.
Therefore, we have the solutions:
s = 80 and L = 60
Therefore, the company used 80 small containers and 60 large containers